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3 years ago

Help please 4 - 2 2/5

Mathematics

2 answers:

torisob [31]3 years ago

7 0

Answer:

1.60

Step-by-step explanation:

4-2-2/5

2/5=0.4

4-2=2-0.4=1.6

monitta3 years ago

5 0

Answer:

fraction form: 8/5

decimal form: 1.6

mixed number form: 1 3/5

Step-by-step explanation:

have a fantastic day! <3

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If a rectangle has side lengths 5x-y and x+4y what would be the area and perimeter of the rectangle?

Dafna1 [17]

Answer:

Answer is given below with explanations. 

Step-by-step explanation:

$given \: \: l = 5x - y \: and \: \: b = x + 4y \\ area \: of \: rectangle \:= l \times b \: sq.units \\ = (5x - y)(x + 4y) \\ = 5 {x}^{2} + 20xy - xy - 4 {y}^{2} \\ = 5 {x}^{2} + 19xy - 4 {y}^{2} \\ perimeter \: of \: rectangle \\ = 2(l + b) \\ = 2(5x - y + x + 4y) \\ = 2(6x + 3y) \\ = 12x + 6y$

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THANKS FOR GIVING ME THE OPPORTUNITY TO ANSWER YOUR QUESTION. 

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4 years ago

For each pair of shapes, decide whether or not Shape A is congruent to Shape B. Explain your reasoning.

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3 years ago

NASA is conducting an experiment to find out the fraction of people who black out at G forces greater than 6 6 . In an earlier s

Xelga [282]

Answer:

The sample size must be atleast 502 to have a margin of error of 0.03

Step-by-step explanation:

We are given the following in the question:

Proportion = 0.32

$\hat{p} = 0.32$

Level of significance = 0.15

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Formula for margin of error =

$z_{stat}\times \sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.15} = 1.44$

We have to find the sample size such that the margin of error is atmost 0.03.

Putting values, we get,

$z_{stat}\times \sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\leq 0.03\\\\1.44\times \sqrt{\dfrac{0.32(1-0.32)}{n}}\leq 0.03\\\\\sqrt{n}\geq 1.44\times \dfrac{\sqrt{0.32(1-0.32)}}{0.03}\\\\\sqrt{n}\geq 22.39\\n\geq 501.3121\\\Rightarrow n\geq 502$

Thus, the sample size must be atleast 502 to have a margin of error of 0.03 in approximation of proportion of people who would black out at 6 or more Gs.

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3 years ago

What is the quotient of 1 1/3 and 5/6?

Musya8 [376]

(1 1/3) / (5/6)
= (4/3) * 6/5
= 8/5

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3 years ago

Read 2 more answers

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iragen [17]

Answer:

5x + 10y + 5z